Zynga's getting ready to rake in the dough this holiday season, but it's all for a good cause. Last week, we learned that FarmVille's new Candy Cane crop is actually part of a larger social media fund-raising effort to help pay for the construction of the UCSF Benioff Children's Hospital, to which Zynga has pledged 100% of its donations.

Details of this new donation campaign can be seen (in the above image and) as a leaked Flash file on the FarmVille website here. Permits to grow the Candy Canes are tentatively priced at a whopping 240 Farm Cash, which is about $40 USD. After which, they'll cost 10 Coins each, sell for 125 Coins, harvest in 2 days, will never wither, and yield 3 XP.

Before anyone freaks out, remember that this is all just a work-in-progress, so the details can change at any time. Now that we have an idea what to expect, the final surprise is what the collectible gift will be. The last major FarmVille charity event -- the "School of Choice" in Haiti -- earned everyone a free "L' Ecole de Choix" Hot Air Balloon for their farms.